Would you vote for a man who promises that he's "making a difference"? How about a woman who says she's "on your side" or a guy who claims to have "experience you can trust"? Maybe ... if you were back in HIGH SCHOOL, that is. Unfortunately, these and other juvenile slogans are part of the free-for-all known as this year's City Council election. Sure, political analysts are cheering because term limits have forced a robust turnover in the Council -- but anyone with an ear for grammar, punctuation or concise writing should be appalled. Or, in other words, what kind of slogan is "Real Results for Real People"? (What, FAKE people don't deserve results?) "Slogans like that make me sick," said Hank Sheinkopf, a veteran political consultant who works for mayoral hopeful Mark Green. "But in local races, the campaign doesn't even have enough money to go to the bathroom, so the slogan is often written by the candidate himself," Sheinkopf said. "And politicians aren't the most creative people in the world." So instead of slick, tried-and-true blather like Fernando Ferrer's "A mayor for all New Yorkers" and Green's "Educating Children, Protecting Families" -- out in the Council districts, where two-bit candidates fight to "make a difference" or "put people first," the voting public is treated to slogans so phenomenally vapid that I and Jimmy Breslin want to shoot ourselves. Breslin once ran for City Council president promising, "No more bulls---!" Now that was a great slogan: Not only does it mock the very IDEA of slogans, but also captures a vast area untouched by conventional politicians (whose slogans are, by definition, a CONTINUANCE of the "bulls---"). "Politicians are sub-human!" Breslin bellowed in a voice that needed a shave. "Green's slogan is something out of a parents magazine! Why do they listen to focus groups? Focus groups are those idiots who stand on line to see `The Price is Right'!" Experts in the field of brand marketing -- and what is a modern politician but a product on a shelf? -- say that most slogans fail because they don't distinguish a candidate in the marketplace of ideas. Who, after all, is the ad wizard who came up with City Council hopeful Peter Williams's impotent slogan, "Prepared to Serve"? "Apple's slogan, `Think Different,' doesn't even mention computers," said Jonathan Chajet, a brand strategist at Siegelgale, a West Coast consulting firm. "But it does convey that Apple helps people express themselves. Candidates need to do that." But slogans must also MEAN something, added branding expert Steve Hersh, who specializes in reviving brands (remember ReaLemon? If you do, you can thank Steve Hersh). "Unknown candidates can't offer fluff," Hersh said. The point, of course, is to give voters what marketing experts call the Reason to Believe. "Most slogans don't give me that RTB," Hersh said. "You can't just say, `Your Best Choice.' Where's my RTB, baby?" Hersh was particularly appalled by Council candidate Tony Spencer's pledge to be "a full-time Councilman." "What, so his campaign promise is to work 9 to 5? Where's the RTB?" I found much worse in my exhaustive survey ("survey" because I visited 80 percent of New York's five boroughs, "exhaustive" because I missed lunch doing it). How about these clunkers: Yvette Clarke for City Council: "Following in a Family Tradition of Service to the Community" (sounds like a slogan for a neighborhood Italian restaurant with mediocre marinara sauce). Herberto Mateo for City Council: "I Need Your Vote" (that's kinda woeful, like Nike taking out an ad reading, "Please buy our shoes so we can make a profit"). Kathryn Freed for Public Advocate: "Someone Always Cares When the City Doesn't" (what is she, Big Brother?). Mitchel Cohen for mayor (write-in), whose poster shows him getting arrested at a 1985 anti-Apartheid rally: "The Most `Arresting' Candidate" (he hasn't been arrested in 16 years and he calls himself qualified?). But my favorite was City Council candidate Paul Bader. While some slogans present candidates as leaders with vision, Bader's slogan promises a leader with 20-20 hindsight: "Paul Bader: The ONLY Democrat who would have voted `yes' on the Brooklyn Cyclones' stadium!" What's next for Bader? "Paul Bader: I would have invested in Microsoft in 1980! No, I really would have!" --30-- email: gershny@yahoo.com